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How to integrate ContactOut MCP with Atomic Agent

Connect Atomic Agent to ContactOut MCP. Find contact emails for acme marketing team, enrich profile for john smith, ceo, and more using natural language, with authentication handled for you.

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ContactOut is a professional profile enrichment and contact discovery API. Find and verify email addresses to power recruiting, sales, and outreach.

25 Tools

Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including ContactOut.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a ContactOut account. See the Atomic Agent documentation for installation instructions.

Also integrate ContactOut with

ChatGPTClaude CoworkHermes

How Atomic Agent connects to ContactOut

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect ContactOut to Atomic Agent

  1. Sign up or sign in to the Composio dashboard. Copy your API key.
  2. In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
  3. Ask Atomic Agent to do something in ContactOut. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your ContactOut account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

What is the ContactOut MCP server, and what's possible with it?

The ContactOut MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your ContactOut account. It provides structured and secure access so your agent can perform ContactOut operations on your behalf.

Use ContactOut from Atomic Agent

With your account connected, ask Atomic Agent to work with ContactOut in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

TOOLS

Supported Tools

Every ContactOut action and event your agent gets out of the box.

Add Campaign Recipients

Add 1-100 recipients to an existing campaign.

Check LinkedIn Contact Availability

Check whether a LinkedIn profile has a personal email, work email, or phone without revealing it or consuming credits.

Count People

Estimate matching people and available personal emails, work emails, and phones from substantive People Search filters without consuming credits.

Create Bulk Email Verification Job

Queue asynchronous deliverability verification for 1-100 email addresses, optionally delivering results to an HTTP or HTTPS callback URL; may consume verifier credits.

Create LinkedIn Contact Info Batch Job

Queue asynchronous contact discovery for 1-1000 LinkedIn profiles, optionally delivering results to a callback URL; may consume credits per profile.

Enrich Companies by Domain

Return company profiles for 1-30 domains; each found company consumes a search credit.

Enrich LinkedIn Profile

Return a professional profile for a regular LinkedIn profile URL, optionally including contact data; may consume search, email, and phone credits.

Enrich Person

Find and enrich one person using a LinkedIn URL, email, or phone; alternatively, provide a name plus employer, education, location, or job-title evidence.

Enrich Person by Email

Return a professional profile matched from an email address, optionally requesting real-time work-email verification.

Find LinkedIn Profile by Email

Resolve an email address to its matching LinkedIn profile URL.

Get API Usage Stats

Return ContactOut API credit usage and quotas for a billing month.

Get Bulk Email Verification Job

Get the status and available per-email results of an asynchronous bulk email-verification job.

Get Campaign

Return one campaign's sequence steps and optionally its performance statistics.

Get Hashed Email Identifiers

Return unordered SHA-256 hashes of normalized personal emails found for 5-100 distinct LinkedIn profiles.

Get LinkedIn Contact Info

Reveal email and optionally phone contact information for one regular LinkedIn profile URL; consumes credits when data is found.

Get LinkedIn Contact Info Batch

Synchronously reveal contact information for 1-100 LinkedIn profiles; may consume email and phone credits per profile.

Get LinkedIn Contact Info Batch Job

Get the status and available results of an asynchronous LinkedIn contact-info batch job.

List Campaigns

Return one page of email campaigns and their lifecycle statuses.

List Decision Makers

Return one page of key decision makers for the best-matching company.

Remove Campaign Recipients

Destructively remove 1-100 recipients from an existing campaign by email.

Search Companies

Return one page of companies matching identity, size, location, industry, technology, revenue, or founding-year filters.

Search People

Return one page of professional profiles matching person, role, employer, education, location, and contact-availability filters.

Start Campaign

Start a draft ContactOut campaign or resume a stopped campaign.

Stop Campaign

Stop a running ContactOut campaign, interrupting its outreach.

Verify Email

Check one email address for valid, invalid, accept-all, disposable, or unknown deliverability.

FRAMEWORKS

How to build ContactOut MCP Agent with another framework

ChatGPT logo

ChatGPT

Use ContactOut MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use ContactOut MCP with Claude Cowork

Hermes logo

Hermes

Use ContactOut MCP with Hermes

FAQ

Frequently asked questions

With a standalone ContactOut MCP server, the agents and LLMs can only access a fixed set of ContactOut tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from ContactOut and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Atomic Agent fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right ContactOut tools.

Yes, absolutely. You can configure which ContactOut scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your ContactOut data and credentials are handled as safely as possible.

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